The password is case-sensitive.

If you failed to obtain the password, check if it is written on the label of the access point (wireless router). If you are using the access point (wireless router) with its default settings, use the password written on the label. The password may also be called a “Key”, a “Passphrase”, and so on.

If you do not know the password for the access point (wireless router), see the documentation provided with the access point (wireless router), or contact the person who set it up.